Knit fabrics



2 Sheets-Sheet 1.

(Model.)

R B BAKER & G H STRAW MACHINE FOR UNITING KNIT FABRICS.

No. 317,702. Patented May 12,1885.

Mwnforav (ModeL) 2 SheetsSheet 2.

R. B. BAKER & G. H. STRAW. MACHINE FOR UNITING KNIT FABRICS.

No. 317,702. Patented May 12. 1885..

.zlllllllm Emmi min -mum. m H a STATES P TENT tries RUFUS B. BAKER AND GEORGE H. STRAW, OF GLAREMONT, N. H.

MACHINE FOR UNITING Kl\l|T FABRICS.

SPECIFICATION forming part of Letters Patent No. 317,702, dated May 12, 1885.

Application filed February 29, 1884.

To all whom it may concern.-

Be it known that we, RUFUs B. BAKER and GEORGE H. STRAW, both of Glaremont, in the county of Sullivan and State of New Hampshire, have invented certain new and usefulImprovements in Machines for Uniting Knit Fabrics by Sewing, (which machines are technically known as circular-looping ma -chinesf) of which the following, in connection with the accompanying drawings, is such a clear and exact description as will enable those skilled in the art to which our invention relates to make and use the same.

The object of our invention is to provide a simple mechanism by which the surplus ma terial of cut knit fabrics, outside of the seam or line of sewing, may be neatly trimmed oii' mechanically during the operation, uniting the fabrics by sewing, but just before the fabrics are presented to the stitch-forming mechanism of the machine. By the use of our invention the trimming and sewing operations are simultaneously effected, thereby obviating the necessity of trimming the work with handshears, as has usually been the practice heretofore.

In the drawings, in which similar letters indicate similar parts in the different views, Figure 1 is a perspective view showing the details of our invention. Fig. 2 is a detail plan view of the needle-guard; Fig.3, an elevation of the knife-carrying arm. Fig. 4 is a sectional elevation of the needle-guard, showing the wastepan, the stationary knife or blade, and the means for connecting the latter to the needleguard. Fig. 5 is a plan view of the waste-pan, waste-guard, and the arm by which these parts areattached to the needle-guard. Fig. 6 is a plan view of a circular-looping machine, showin g our invention in operation relative to the stitch-forming mechanism thereof. Fig. 7 is an elevation of the same,and Fig. Sis a detail sectional view.

I is a supporting plate or bracket having standards 11 and t in which is journaled the driving-shaft 1?. An arm, 6*, attached to the standard 43 sustains the bar K, supporting a disk, K, on which revolves the rotary needle or pin plate L provided with impaling needles or pins 1. This pin-plate receives an intermittent rotary movement in the direction indicated by the arrows in Figs. 6 and 7 from (Model) operated by a grooved eccentric, p", on the V shaft 1 The needle arm P is provided with a sleeve, H, by which it is pivoted on a stud, i extending horizontally from the arm 6 said sleeve being retained on said stud by a collar, i secured by a S13i3-SCFBW,7;

The parts thus far described are, or may be, of ordinary or well-known construction, and, not being new, their operation is understood by those familiar with this class of machines, and need not therefore be more fully indicated, our invention relating to the mechanism, which we will now describe.

A indicates a plate, which we term a needleguard, said plate being attached to the disk L and having an opening, a, in which the,

looper '0 can work, an aperture, 1', through which the needle 0 can pass, and a notch, h, in its edge.

A is an arm, preferably of spring metal, attached to the needle-guard A by a screw, G, which is, or may be, one of the screws by which the said needle-guard is secured to the disk L The arm A carries at itsouter end a block or knife-holder, h, fitting in the notch h of the needle-guard, said block, as herein shown, being attached to said arm by a screw, 1). The block or knifeholder It has a dovetailed or undercut groove, in which is held the stationary knife or ledger blade k.

G is a knife-carrying arm, rigidly attached by means of a split-eye and a set screw, 0, to the needle-bar sleeve H. To the lower end of the vibrating arm 0 is secured by a screw, a, a knife-holder, B, carrying the movable knife or blade cl, arranged to come in contact with and just above the stationary knife or blade is, and thus these knives can out like shearblades. The stationary knife can be adjusted to bring it into proper position relative to the movable knife by means of an adj Listing-screw, a passing through the arm A and abutting against the needle-guard A. (See Fig. 8.)

D is a waste-guard attached by the screw b to the arm A, the free or forward end of I said waste guard being bent downward, so as to be nearly in contact with the pins of the pin-plate, and the outer edge thereof being inclined, as shown in Figs. 5 and 6.

F is a waste-pan hinged at e to the wasteguard D, the inner edge of the outer portion of said Waste-pan being inclined, as shown in Figs. 5 and 6, in a direction opposite to that of the outer edge of the waste-guard, the ad jacent edges of these two parts thus convergin g rearwardly toward each other.

The toe L of the movable knife-holder B is arranged to strike against the under side of the hinged waste-pan and lift the same slightly at each stroke; and. L is a spring pressing against the rear side of said waste-pan, and thus serving to return the latter after it has been lifted by the toe b.

The operation of our invention is as follows: The fabrics to be trimmed and sewed being impaled on the pins Z of the pin-plate L and the machine being set in motion, the fabrics will approach the trimming and stitch'i'orming mechanisms. The edges of the fabrics, projcctin g above the pins 1, are liable to curl more spring-pressed waste-pan will tend to deflect them in the opposite direction, thus bringing the edges to be trimmed into a vertical position, so that they will bepassed between the knives or blades (1 and It, and as the former blade, vibrating with the needle-bar and needle, comes in contact with the latter blade, the projecting edges of fabrics will be closely sheared off, after which the trimmed fabrics will be united by the stitch-forming mechanism in the usual manner. The surplus or waste material trimmed ofi will be received by the waste-pan F, and the vibrating movements of the latter will assist in defiectin g the loosened or trimmed-off material away from the pin-plate, thus preventing it from getting in the way of the stitch-formin g mechanism.

Having thus described our invention, what we claim, and desire to secure by Letters Iatent, is-

1. The combination, with the pin-plate of a looping-machine, of a stationary knife or blade and a vibrating knife or blade moving coincidently with the needle and having a shear contact with the stationary blade, substantially as set forth.

2. The combination, with the pin-plate, the stationary knife or blade, and the movable knife or blade, of the waste-guard and the waste-pan, substantially as set forth.

3. The combination, with the pin-plate, the stationary knife or blade, and themovable knife or blade, of a waste-guard and a wastepan, said waste-guard and waste-pan having adjacent inclined edges converging rearward] y toward each other, substantially as set forth.

4.. The combination, with the pin-plate, of the needle-guard A, the arm A, attached thereto and having the knife-holding block h, carrying the stationary knife k, the vibrating arm 0, having the knife-holder B, carrying the movable knife d, the waste-guard D, and the wastepan F, substantially as set forth.

5. The combination, with the pin-plate, the needle-guard, the arm attached thereto, the wasteguard, the hinged waste-pan, its returningspring, and the stationary knife, of the vibrating arm 0, the knife-holder B, having the toe b, and the movable knife d, carried by said holder, substantially as set forth.

6. The combination, with the pin-plate and the stationary knife, of the needlebar sleeve H and its operating mechanism, the arm (J, secured to said sleeve, the knife-holder B, carried by said arm, and the movable knife d, at tached to said knife-holder, substantially as set forth.

RUFUS l3. BAKER. GEORGE H. STRAW. \Vitnesses:

Urmnnns B. Boron, S. I. L. WoonnURY. 

